Fan



R. A. ROSSOE.

FAN.

APPLICATION man JAN. 2. 191a. 1 384: 1 551 Patented July 12, 1921,-

n s SHEETS-SHEET 1- R. A. ROSSOE FAN.

APPLICATION man JAN. 2. 191a.

Patented July 112, 1921.

3 SHEETS-SHEET 3.

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cairn stares RAGNAR A. ROSSOE, OF CHICAGO, ILLINOIS, ASSIGNOR TO IT. S.PRODUCTS CORPORA- TION, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

FAN.

'1 0 (all whom it may concern:

Be it known that I, RAGNAR A. Rosson, a citizen of the United States,residing at Chicago, in the county of Cook and State of Illinois, haveinvented a certain new and useful Improvement in Fans, of which thefollowing is a full, clear, concise, and exact description referencebeing had to the ac companying drawings, forming a part of thisspecification.

My invention relates to fans.

I have found that the fans constructed for use in connection withautomobile radiators are highly inefficient, poorly designed andexcessive in weight and cost.

The result is that radiators, even if of good design, do not develop theproper capacity and cause overheating of the cooling medium.

The object of my invention is to provide an improved fan of highefficiency, low in cost of construction and strong and depend able inmechanical structure.

I do not intend to limit my invention to fans for automobiles, butconsider that the improvements which I have outlined may be applicablein other relations.

In the patent to Halvorsen No. 1,031,5et5, granted July 2nd 1912, thereare disclosed the principles involved in the construction of a screwpropeller of high efiiciency. I have adapted the principles thereinformulated to the use of propelling air,that is, the design of the fan.

In the accompanying drawings I have illustrated my invention as appliedto a radiator fan for a well known type of automobile.

It is well known that in this particular type of automobile the capacityof the radiator is insufficient to keep the engine cool, particularlywhen the same is operating on heavy load at relatively low speed.

In the accompanying drawings Figure 1 is a front elevation of a fanconstructed in accordance with my invention;

Fig. 2 is a side elevation of the same;

ig. is an elevation of one section of the fan;

Fig. 4 is a fragmentary cross section illustrating the manner ofattaching one section to an adjacent section;

Fig. 5 is an exploded view of the pulley and bushings;

Fig. 6 is a sectional view taken on line Specification of LettersPatent.

Patented July I2, 1921. Serial no. 209,857.

6-6 of Fig. 1 showing the pulley members, fan hubs, and bushings inassembled form;

Fig. 7 is a sectional view of a modified form of my fan;

Fig. 8 is a sectional view of the above form adapted for the receptionof ball bearings; and

Fig. 9 is a fragmentary detail section of a modified construction of theabove.

I construct the fan shown in the drawings from sheet metal. The fanconsists of a plurality of sections which are jointed together, as willbe described later. These sections are stamped from flat metal in theoutline shown in general in Fig. 3 by means of the dotted lines 1. Thesection comprises a fan portion 2 and a hub portion 8, this hub portionhaving a rearwardly projecting portion l which becomes flanged forattaching to the driving pulley 5.

After the section is blanked out, the hub portion 3 is formed as isshown in full lines in Fig. 3 and also as shown in Fig. 4. This hubportion is formed into a section of a cylinder as shown at 6 with aflange 7 at the rear edge of the same. This forming is preferably doneby stamping at a single operation. An attaching portion 8 extends fromthe edge of the cylindrical hub portion 6 and is adapted to be joined tothe blade portion of the adjacent section, as by means of the rivets 9(see Fig. l).

After the hub portion has been formed, the'blade portion 2 is stamped orformed into the curvature shown in Figs. 1 and 2 s previously explained.the blade is formed according to the principle set out in the abovementioned I-Ialvorsen patent.

Then the sections have been secured together to form a complete fan, thepulley 5 is attached to the flanges T which are trimmed to a circular orarcuatc formation. The pulley 5 comprises a pair of flanged cup members101O placed back to back so that the bottoms ll of the cups form the webof the pulley. The flanges 12 serve to guide the belt and prevent itfrom running off the pulley.

As shown in section in Fig. 6, the flange 7 of the hub portion of eachsection is attached to the web of the pulley 5 by means of rivets 13which extend through the web of the pulley and through the flange lel ofa collar 15 that is placed upon the other side of the web.

' Fig. 7 I attach the fan The structure thus far described forms a lightbut very strong fan and pulley structure. This structure is providedwith bearings by means of the bearing bushings 16 and 17 which areintroduced into opposite endsof the bore of the fan and pulley structureabove described. The bushing 17 is of a,

length such that it extends through the flange collar and through thebore of the web of the pulley 11 into the bore of the cylindrical hubformed by'the curved portion 6. The bushing 16 extends into the boreformed by the curved portion 6 and thus the two bushings 16 and 17 arebrought into alinement very readily.

ln the modified embodiment illustrated in sections together by weldingand equip the fan with a crowned pulley formed of a single piece ofmetal. In this form the rear portion 1 of each fan section is madeconsiderably longer than in the previous embodiment to enable theseportions to extendentirely through the pulley to support the same andfor attaching to the web of the pulley, this web being on the side ofthe pulley farthermost from the fan. The fan sections are blocked outwith the outer edge 20 of the rear portion 1 inclined slightly towardthe axis of the fan as shown. The sections are assembled as previouslydescribed with the exception that the-attaching portions 8" are spotwelded to the blades 2 at the points 21 rather than riveted. Thesucceeding step is to cut flat faces 22 on the inclined edges 20 of allfour sections by one simultaneous operation of a circular die. Thisassures that the annular seat for the edge of the crowned pulley 5affordedby these flat faces 22 will be concentric with the axis of thefan. The blanks are recessed as shown at 23 so that the above dieoperation will leave a clean cut.

The pulley 5 is formed with the marginal flanges 2-l'25 bein crownedbetween these flanges to secure'more effective belt contact.

The rear flange is shaped back upon itself to form the web 26 of thepulley. The resulting pulley is of cup-shape with open and closed ends.edge of the pulley 5 bears uponand 18 mgidly supported by the flat faces22 of the rear portions 4: These four rear portions 4 constitutelongitudinal webs for radially bracing the open end of the pulley 5".The radial web 26 of the pulley is'spot welded (or riveted) at flanges 7of each of the fan sect-ions.

In Fig. 8 I have shown the type of fan just described adapted for thereception of ball bearings 30-31. The fan sections are formed andassembled in substantially the same manner as described with theexception that in this embodiment the edges 20 of the rear portions 4'are illustrated as out In mounted position the open the polnts 27-27 tothe fan, the faces 22 these edges for the open end of parallel to theaxis of the projecting slightly .bove receiving and supporting the cupshaped nulley 5.

A sleeve 32 its into the hub of the assembled fan for alining the outerraces 33- 3 l of the ball bearings. This sleeve is desirable though notessential for this purpose.

The rear race 33 has a flange 33 at the rear edge thereof which bearsagainst the web 26 extending between it and the end of the sleeve 32.The flange 34 of the front race seats in an annular recess 32' formed inthe front end of the sleeve 32. The inner races 35-36 are mounted on thespindle 37 and have fabric oil retaining rings thereon which engage theouter races and seal the ends of the bearings against leakage oflubricating oil from the interior of the sleeve 32. This oil is admittedthrough the oil cup 38 which also functions as a key to rigidly securethe fan to the sleeve 32. A nut 42 threads upon the front end of thespindle 37 for adjusting the inner races of the bearings and is keyed orpinned to the spindle in any suitable manner. The ball bearings aredesigned for assuming both the radial and thrust loads of the fan. A hubcap 39 seats 'in the recess 32, being retained therein by a small splitring 4.0 engaging in an annular'groove in the recess 32. Instead ofrecessing the end of the sleeve 32 it may be given an annular offset 4L1as shown in Fig. 9, forreceiving the flanged end of the outerrace 34 andthe hub cap 39.

I find the practice of spot welding the fan sections and pulley togethermore expeditious than riveting inasmuch as the labor involved in cuttingthe rivet holes is avoided. Moreover the welded fan is equally as strongas the riveted fan and neater in appearance. I It will be apparent thatthe riveted form of fan illustrated in Figs. 1 to 6 is also adaptable tothe provision of ball bearings in much the same manner as yifustdescribed in connection with the welded I have made tests comparing theefficiency 115 of the fan constructed as above described withthestandard fan employed on a well known make of car and I find that theeliiciency under various, conditions is higher I from 10 to 100 percent. than that of the 120 fan furnished with the'vehicle. r

I do not intend to be limited'to the precise details of constructionshown and described.

I claim: r V

1. In a fan, a plurality of sections; each comprising a segmental hubportion lyingin a substantially circumferential plane, an integral bladeportion lying in a radial plane, anattachin'g portionfthe attachingportions 130 ill) of the sections being connected to the respectiveblade portions of adjacent sections.

2. In a fan, a plurality of sections each comprising a blade portion,ahub portion extending normally to the blade portion and an attachingportion and means for securing the sections together with the attachingportions of one section rigidly connected to the blade portion ofanother section.

3. in a fan, the combination with, a plurality of sections, each sectioncomprising a blade portion and a hub portion, said hub portion extendingaxially from the blade portion, said extension comprising a radialflange, of a radial plate for connecting said radial flanges together.

i. In combination, a plurality of fan sec tions, each comprising anintegral blade, a hub portion, said hub portion comprising a radialflange, and a pulley having a radial attaching plate'ior attaching thesame to the radial flange of each hub portion.

5. In combination, a plurality of fan sections, each comprising anintegral blade and hub portion, said hub portion comprising a radialflange and having a tubular bore, a pulley comprising a pair ofcup-shaped members placed back to back to form a central radial web, aflanged collar for engaging' one side of said web, said flanged hubsections being attached to the other side of the web and a bushingprojecting through the collar and through the pulley into said tubularbore.

6. In combination, a plurality of fan sections, each comprising anintegral blade por tion and a hub portion, said hub portion comprising atubular bore and having a ra dial flange, a pulley having a radialattach-- ing face for attaching to the radial flange of each hub portionand a bushing projecting through the pulley and into the tubular bore ofthe hub portion.

7. In combination, a plurality of fan sections each comprising anintegral blade, a hub portion, and-a radial flange on said hub portion,said sections being attached together, a pulley having a radial web atone edge thereof, the hub portions of said fan sections extendingthrough said pulley and the radial flanges being attached to the fadialweb of said pulley.

8. In combination, a fan comprising a plurality of fan sections eachhaving a blade portion, a hub portion and a segmental flange on said hubportion, a pulley for said 'lan, said pulley having its web or spider atone edge thereof, the hub portions of said fan sections extendingthrough said pulley, said segmental flanges being attached to the web ofsaid pulley.

9. In combination, a fan comprising a plurality of fan sections eachhaving an integral blade and hub-portion, said hub portion having aradial flange and a longitudinal web, and a pulley having a radial webat one edge thereof for attaching to the radial flanges of each hubportion, the other edge of said pulley being supported by thelongitudinal webs on said portions.

10. In combination, a fan comprising a plurality of fan sections eachhaving a blade portion, a hub portion, an attaching portion, and asegmental flange on one end of said hub portion, said sections beingsecured together by connection between said attaching and bladeportions, a pulley for said fan, said pulley being formed of one pieceof metal and having a crowned periphery, a web or spider at one edge ofsaid pulley and integral therewith, said hub portions extending axiallythrough said pulley, said segmental flanges being attached to said webor spider.

11. In combination, a fan comprising plurality of fan sections, eachhaving a blade portion, a hub portion, and a radial flange on said hubportion, a pulley having its web secured to the radial flanges of saidfan sections, a sleeve within said hub portions, a spindle within saidsleeve and anti-friction bearings between said sleeve and said spindle.

12. In combination, a fan comprising a plurality of fan sections eachhaving a blade portion, a hub portion, and a radial flange on said hubportion, a pulley having its web secured to the radial flanges of saidfan section, a sleeve within said hub portions, means for keying saidsleeve and said hub portions together, a spindle within said sleeve,ball bearings between said sleeve and i said spindle, a cap memberseated in the end or said sleeve, and a retaining ring for said capmember engaging in a groove in the end of said sleeve.

13. In combination, a fan composed 01'' a plurality of fan sections,radial segments on each of said fan sections, and an integral pulleycomprising a pulley :t'ace, flanges, and a radial web or spider, saidweb or spider being secured to said radial segments.

In witness whereof I hereunto subscribe my name this 21st day ofDecember, A. D.

RAG-NAB A. ROSSOE.

